EP 0281375 A3 19891129 - OXYGEN ANALYZER
Title (en)
OXYGEN ANALYZER
Publication
Application
Priority
US 2184687 A 19870304
Abstract (en)
[origin: EP0281375A2] A gas analyzer for measuring the concentration of oxygen and combustible gases in a gas stream includes an electrochemical cell maintained at about 800 DEG C and having electrodes attached to a process side and a reference side in which a cavity is formed having a diffusion limiting port forming the entrance to the cavity. The size of the port is determined by: R = W/(k*D*C), where r is the radius of the diffusion limiting port; W is the diffusion rate of combustible gases in the gas stream through the port; D is the diffusion coefficient of the combustible gases in the gas stream; C is the concentration of the combustible gases in the gas stream; and k = 2* pi *R<2>/((2*r*1)+R<2>), where R is the radius of the electrochemical cell and 1 is the difference between the length L and the radius R of the electrochemical cell. The voltage between the electrodes gives indication of the concentration of O2 and combustible gases in the stream.
IPC 1-7
IPC 8 full level
G01N 27/407 (2006.01); G01N 27/416 (2006.01); G01N 27/419 (2006.01)
CPC (source: EP)
G01N 27/407 (2013.01)
Citation (search report)
- [A] US 4537661 A 19850827 - LEE PANG K [US], et al
- [A] DE 2654483 A1 19770707 - WESTINGHOUSE ELECTRIC CORP
- [A] US 4158166 A 19790612 - ISENBERG ARNOLD O [US]
- [A] US 4547281 A 19851015 - WANG DA Y [US], et al
- [A] EP 0166530 A1 19860102 - FUJIKURA LTD [JP]
- [A] EP 0144057 A2 19850612 - HITACHI LTD [JP]
- [A] TRANSACTIONS OF THE INSTITUTE OF MEASUREMENT AND CONTROL, vol. 6, no. 2, April-June 1984, pages 67-76, Dorking, GB; R.M.A. KOCACHE: "A review of the evolution and development of solid-electrolyte oxygen sensors"
Designated contracting state (EPC)
BE CH ES FR GB IT LI SE
DOCDB simple family (publication)
EP 0281375 A2 19880907; EP 0281375 A3 19891129; JP S63234148 A 19880929
DOCDB simple family (application)
EP 88301812 A 19880302; JP 5140888 A 19880304